1121-84-2Relevant academic research and scientific papers
CH3ReO3/H2O2 in room temperature ionic liquids: An homogeneous recyclable catalytic system for the Baeyer-Villiger reaction
Bernini, Roberta,Coratti, Antonietta,Fabrizi, Giancarlo,Goggiamani, Antonella
, p. 8991 - 8994 (2003)
The Baeyer-Villiger oxidation of cyclic ketones can be effected by methyltrioxorhenium/hydrogen peroxide in the ionic liquid [bmim]BF4. After simple extraction of the lactone with diethyl ether, the catalyst can be repeatedly recycled and efficiently reused for the lactonisation process in the same reaction medium.
Acceptorless dehydrogenative lactonization of diols by Pt-loaded SnO2 catalysts
Touchy, Abeda Sultana,Shimizu, Ken-Ichi
, p. 29072 - 29075 (2015)
We report herein a new heterogeneous catalytic system for dehydrogenative lactonization of various diols under solvent-free and acceptor-free conditions using 1 mol% of Pt-loaded SnO2, providing the first successful example of acceptorless lactonization of 1,6-hexanediol to ε-caprolactone by a heterogeneous catalyst. This journal is
A volatile lactone of Hymenoscyphus pseudoalbidus, pathogen of European ash dieback, inhibits host germination
Citron, Christian A.,Junker, Corina,Schulz, Barbara,Dickschat, Jeroen S.
, p. 4346 - 4349 (2014)
The largely unknown secondary metabolism of the plant pathogenic fungus Hymenoscyphus pseudoalbidus was investigated by use of the CLSA method. A set of volatile lactones was identified by GC/MS. The lactones were synthesized and used in bioassays in which one of the compounds was found to be a strong germination inhibitor for ash seeds, causing necroses in the plant tissue. The largely unknown secondary metabolism of the plant pathogenic fungus Hymenoscyphus pseudoalbidus was investigated by use of the closed-loop stripping apparatus (CLSA) method. A set of volatile lactones was identified by GC/MS. The lactones were synthesized and used in bioassays in which one of the compounds was found to be a strong germination inhibitor for ash seeds.
Photobiocatalytic alcohol oxidation using LED light sources
Rauch,Schmidt,Arends,Oppelt,Kara,Hollmann
, p. 376 - 379 (2017)
The photocatalytic oxidation of NADH using a flavin photocatalyst and a simple blue LED light source is reported. This in situ NAD+ regeneration system can be used to promote biocatalytic, enantioselective oxidation reactions. Compared to the traditional use of white light bulbs this method enables very significant reductions in energy consumption and CO2 emission.
Asymmetric conjugate addition of grignard reagents to pyranones
Mao, Bin,Fa?anás-Mastral, Martín,Feringa, Ben L.
, p. 286 - 289 (2013)
An efficient enantioselective synthesis of lactones was developed based on the catalytic asymmetric conjugate addition (ACA) of alkyl Grignard reagents to pyranones. The use of 2H-pyran-2-one for the first time in the ACA with Grignard reagents allows for a variety of further transformations to access highly versatile building blocks such as β-alkyl substituted aldehydes or β-bromo-γ-alkyl substituted alcohols with excellent regio-and stereoselectivity.
PROCESS FOR THE PREPARATION OF (Z,2E)-5-[1-(4-CHLOROPHENYL)PYRAZOL-3-YL]OXY-2-METHOXYIMINO-N,3-DIMETHYL-PENT-3-ENAMIDE DERIVATIVES
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Page/Page column 14, (2021/04/30)
The present invention relates to a process for the preparation of (Z,2E)-5-[1-(4- chlorophenyl)pyrazol-3-yl]oxy-2-methoxyimino-N,3-dimethyl-pent-3-enamide derivatives suitable for use, e.g., as active ingredients, which have microbiocidal activity, in particular, fungicidal activity.
Ruthenium-Promoted Acceptorless and Oxidant-Free Lactone Synthesis in Aqueous Medium
Bhatia, Anita,Kannan, Muthukumar,Muthaiah, Senthilkumar
supporting information, p. 721 - 725 (2019/03/26)
Ruthenium-catalyzed formation of lactones from diols in aqueous medium has been demonstrated. 1,3,5-Triazaphosphaadamantane (PTA) included water-soluble ruthenium complexes [RuCl 2 (PPh 3)(2,6-Py-(CH 2 -PTA) 2 ]·2Br and [RuCl 2 (PPh 3) 2 (2-PyCH 2 PTA)]·Br in the presence of KOH were found to be efficient for the synthesis of lactones from diols. The reported synthetic protocol is green as it uses water as solvent, avoids the use of any hydrogen acceptor/oxidant, and produces hydrogen as the only side product. Mechanistic studies revealed that lactone formation involved aldehyde intermediate and followed dehydrogenative pathway.
Stereoselective synthesis of alicyclic ketones: A hydrogen borrowing approach
Armstrong, Roly J.,Akhtar, Wasim M.,Frost, James R.,Christensen, Kirsten E.,Stevenson, Neil G.,Donohoe, Timothy J.
supporting information, (2019/11/13)
A highly diastereoselective annulation strategy for the synthesis of alicyclic ketones from diols and pentamethylacetophenone is described. This process is mediated by a commercially available iridium(III) catalyst, and provides efficient access to a wide range of cyclopentane and cyclohexane products with high levels of stereoselectivity. The origins of diastereoselectivity in the annulation reaction have been explored by a series of control experiments, which provides an explanation for how each stereocentre around the newly forged ring is controlled.
Stereoselective Synthesis of Cyclohexanes via an Iridium Catalyzed (5 + 1) Annulation Strategy
Akhtar, Wasim M.,Armstrong, Roly J.,Frost, James R.,Stevenson, Neil G.,Donohoe, Timothy J.
supporting information, p. 11916 - 11920 (2018/09/27)
An iridium catalyzed method for the synthesis of functionalized cyclohexanes from methyl ketones and 1,5-diols is described. This process operates by two sequential hydrogen borrowing reactions, providing direct access to multisubstituted cyclic products with high levels of stereocontrol. This methodology represents a novel (5 + 1) strategy for the stereoselective construction of the cyclohexane core.
Phosphine-pyridonate ligands containing octahedral ruthenium complexes: Access to esters and formic acid
Sahoo,Jiang,Bruneau,Sharma,Suresh,Roisnel,Dorcet,Achard
, p. 3492 - 3498 (2017/08/23)
The preparation of three well-defined ruthenium complexes arising from phosphine-pyridon-e/-ate ligands is described. Solvent dependent Lewis acidic species formation was observed with these complexes. Selective formation of acetals or esters from primary alcohols was observed in the presence of these catalysts. Preliminary evaluation of these complexes in the base free hydrogenation of carbon dioxide is also reported.
